Should be easy to port to Qt5 / Sailfish OS:
https://github.com/sailfishapps/heebo

The initial porting step would look something like this:
https://github.com/sailfishapps/heeb...152ba92091050a

Someone, please feel free to pick this up from there and finish it. What's left would probably be testing, fixing bugs, maybe re-enabling particles and RPM packaging (bonus points for libsailfishapp usage). I personally don't have time to pursue this, but the patch above should give a good idea of how to get started porting a Qt4/QtQuick1 app to Qt5/QtQuick2, and heebo was already structured quite nicely for multi-Qt-platform porting (MeeGo and Symbian).